Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch feature_05182023 until the 17th century Crystal

until the 17th century Crystal Quartz was believed to be permanently frozen water

All species of garnets possess similar physical properties and crystal forms

These needle to like black inclusions of Tourmaline are quite striking within the clear

The addition of the rhodium plating not only protects these from oxidation but also highlights the Widmanstätten pattern

often with a mottled appearance

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch feature_05182023 until the 17th century CrystalThis variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, manganese and other metallic oxides captured during the forming of the rock. Opals are hydrated amorphous forms of silica, created when silica hardens within the fissures of other stones.